Add Kiai in "inspector" section of editor

[tadatomix]

To be fair, I'm fine with having it anywhere else, but it just seems quite logical to have it there, imo. In addition, it won't take any extra place and can be expanded/collapsed easily

Me and vatei have been discussing the design for it, year ago, but didn't come up with any solid choice. Here's 4 concepts that may or may not fit well with lazer's design code:

[tadatomix]

related mention of it was there (#34717), but I decided to open a spare discussion, so i can show design concepts

[tadatomix]

idea with kiai label has started to get implemented thanks to Hivie #39000